i40e: enable descriptor prefetch for VFs

As recommended by the hardware guys, enable descriptor prefetch for
rings belonging to VFs. This matches a change already made for ring
belonging to the PF.

Change-ID: Idcc4dc7064bc9144ea81f5701ad07b7ecd11ba49
Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Tested-by: Sibai Li <sibai.li@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index 8564b0939dc4a4805e8600f81dd86883d061b938..7ab40ffd5a54d88b01e81b3b88992b0bcd300a65 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -354,6 +354,7 @@ static int i40e_config_vsi_rx_queue(struct i40e_vf *vf, u16 vsi_idx,
        rx_ctx.tphhead_ena = 1;
        rx_ctx.lrxqthresh = 2;
        rx_ctx.crcstrip = 1;
+       rx_ctx.prefena = 1;
 
        /* clear the context in the HMC */
        ret = i40e_clear_lan_rx_queue_context(hw, pf_queue_id);